CULTURAL CHARACTERISTICS: OA; colonies 55-65 mm diam. after growing 7 days in darkness at 20°C; mycelium cottony, grey or olivaceous at centre, white at margin; agar surface pink toward margin; reverse grey. After 4-7 days in daylight pink colour fades; agar surface covered with black pycnidia, sometimes confined to a band up to 15 mm broad halfway between centre and edge of colony; conidial slime pink. ME; 50-60 mm diam. after 7 days; aerial mycelium sparse; agar olivaceous. Scattered pycnidia formed after 7 days in daylight. Pycnidia 100-300 µm diam., 1-several ostioles, globose or irregular in shape, often aggregated into clumps of 4-6 pycnidia with confluent walls. Walls of 2-3 layers of pale brown pseudoparenchymatous cells. Conidiogenous cells hyaline, ampulliform, phialidic. Conidia hyaline, oblong-elliptic, nonseptate, (4-)5-8.5(-10) x (1.5-)2-3(-4) µm.

INOCULATIONS: The fungus did not initiate an obvious disease reaction in any of the test plants. However, pycnidia sometimes formed in the narrow band of dead tissue immediately surrounding wound sites. There was no apparent effect on the growth of the plants.

CULTURAL CHARACTERISTICS: OA and ME; colonies 15-25 mm diam. after growing 7 days in darkness, 20°C; aerial mycelium short, cottony, grey; agar surface dark grey, often undulate; reverse grey. Pycnidia 70-100 µm diam., globose, single ostiole, often take several weeks to form. Walls of 1-2 layers of pale brown pseudoparenchymatous cells, lined with ampulliform, hyaline, phialidic conidiogenous cells. Conidia hyaline, oblong-elliptic, nonseptate, (3-)3.5-4.5 x 1-1.5 µm.

INOCULATIONS: The fungus initiated no obvious disease reaction in the test plants. A few pycnidia were found forming in the band of dead tissue immediately surrounding some of the wound sites.